Valaja, Jarmo, Timo Alaviuhkola, and Kaija Suomi. “Reducing Crude Protein Content With Supplementation of Synthetic Lysine and Threonine in Barley - Rapeseed Meal - Pea Diets for Growing Pigs”. Agricultural and Food Science 2, no. 2 (March 1, 1993): 117–123. Accessed November 22, 2024. https://journal.fi/afs/article/view/72640.